Surveyor

One placed to superintend others; an overseer; an inspector.

One who views and examines for the purpose of ascertaining the condition, quantity, or quality of anything; as, a surveyor of highways, ordnance, etc.

One who surveys or measures land; one who practices the art of surveying.

An officer who ascertains the contents of casks, and the quantity of liquors subject to duty; a gauger.

In the United States, an officer whose duties include the various measures to be taken for ascertaining the quantity, condition, and value of merchandise brought into a port.

someone who conducts a statistical survey